#include <stdio.h>
#include <string.h>
#define MAX(a, b) ((a) > (b) ? (a) : (b))

int findLUSlength(char* a, char* b) {
    int lena = strlen(a);
    int lenb = strlen(b);
    return strcmp(a, b) != 0 ? MAX(lena, lenb) : -1;

}

int main()
{
	return 0;
}